Umbonia crassicornis, commonly known as the thorn bug, is a species of insect belonging to the family Membracidae. It is characterized by its unique appearance, with a prominent horn-like projection on the head of both males and females. These insects are typically found in tropical and subtropical regions, where they feed on plant sap using their piercing mouthparts. The thorn bug is known for its remarkable camouflage, as its body shape and coloration resemble thorns or spines, allowing it to blend in with its surroundings and avoid predators.